session

type DownCounter interface {
	DownTraffic(uint64)
}

type DownCounters []DownCounter

type ID uint32

type Info struct {
	ID      ID
	Source  net.Destination
	Gateway net.Destination
	// if not nil, this is the original target address and it is an ip in fake dns pool
	FakeIP          net.IP
	Target          net.Destination
	InboundTag      string
	InboundProtocol string
	UdpUuid         uuid.UUID
	Sockopt         *Sockopt
	User            string

	Sniffed       bool
	Protocol      string
	SniffedDomain string

	AppId       string
	MatchedRule string

	ActivityChecker *signal.ActivityChecker
	// all up traffic should be added to the counter. It typically contains user traffic meter,
	// session traffic meter, and outbound link traffic meter.
	UpCounter   UpCounters
	DownCounter DownCounters
	// for debug purpose
	SessionUpCounter   atomic.Uint64
	SessionDownCounter atomic.Uint64
	// the selector being used initially
	UsedSelector string
}

type Option func(*Info)

type SessionCtxKey int

type Sockopt struct {
	// Mark of the socket connection.
	Mark           uint32
	InterfaceName4 string
	InterfaceName6 string
}

type UpCounter interface {
	UpTraffic(uint64)
}

type UpCounters []UpCounter